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Heart rate measurement method capable of removing motion noise in photoelectric plethysmography signals

A technology of photoplethysmography and measurement methods, which is applied in the measurement of pulse rate/heart rate, diagnostic recording/measurement, medical science, etc., to achieve the effect of eliminating motion noise and improving accuracy

Active Publication Date: 2016-09-21
ZHEJIANG NORMAL UNIVERSITY
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Problems solved by technology

[0006] The technical problem to be solved by the present invention is how to provide a method for effectively removing motion noise in the case of very strong motion noise, so as to achieve the purpose of accurately obtaining real-time heart rate

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  • Heart rate measurement method capable of removing motion noise in photoelectric plethysmography signals
  • Heart rate measurement method capable of removing motion noise in photoelectric plethysmography signals
  • Heart rate measurement method capable of removing motion noise in photoelectric plethysmography signals

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Embodiment 1

[0025] Embodiment 1. Heart rate measurement method for removing motion noise in photoplethysmography signal

[0026] figure 1 It is a schematic flow chart of the heart rate measurement method for removing motion noise in the photoplethysmography signal of this embodiment, figure 2 It is a schematic flow chart of the spectral peak tracking method of this embodiment.

[0027] figure 1 The present embodiment shown is the overall flow of the heart rate measurement method for removing motion noise in the photoplethysmography signal, which mainly includes the following steps:

[0028] Step S210, using two pulse oximeters distributed in different positions to collect photoplethysmography signals (hereinafter referred to as PPG) of two channels 1 and PPG 2 ), and then utilize the three-axis accelerometer to collect the motion acceleration signals of the three channels within the same time period;

[0029] Step S220, the initial sampling frequency of the above original signal is ...

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Abstract

The invention discloses a heart rate measurement method capable of removing motion noise in photoelectric plethysmography signals; and the method is capable of effectively reducing influence of the motion noise in heart rate measurement. The method comprises the following steps: collecting a plurality of photoelectric plethysmography signals and motion acceleration signals of a user within a same time period by virtue of a pulse oximeter and a triaxial accelerometer; constituting a frequency spectrum matrix by virtue of the plurality of the photoelectric plethysmography signals and motion acceleration signals; then, constructing a frequency spectrum matrix decomposition model in accordance with the structural characteristics of overall sparsity and line sparsity of the frequency spectrum matrix, and solving an optimal solution of the frequency spectrum matrix decomposition model by virtue of a proximal gradient acceleration optimization algorithm; and finally, accurately positioning the location of a heart rate frequency point by virtue of a spectrum peak tracking method. With the application of the method disclosed by the invention, the motion noise in the photoelectric plethysmography signals can be effectively eliminated, and the accurate heart rate measurement based on a wearable device can be achieved.

Description

technical field [0001] The invention relates to heart rate measurement in exercise state, in particular to a heart rate measurement method for removing motion noise in photoplethysmography signals. Background technique [0002] With the development of miniaturization of electronic technology and people's emphasis on health, the method of heart rate measurement using photoplethysmography signal has attracted great attention from academia and industry. The photoplethysmography signal is a biological signal extracted from the skin surface by means of a non-invasive detection method, and its signal strength is weak and susceptible to noise interference. In the state of exercise, there is motion noise interference due to tissue interference, venous blood volume, and optical path changes, and the frequency of motion noise is very close to the frequency of heart rate in many cases, which makes heart rate measurement more difficult. [0003] Aiming at the elimination of motion nois...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/024A61B5/02A61B5/11A61B5/00
CPCA61B5/02A61B5/02416A61B5/02438A61B5/1118A61B5/681A61B5/6824A61B5/7207A61B5/7235A61B5/725
Inventor 熊继平蔡丽桑汤清华王妃
Owner ZHEJIANG NORMAL UNIVERSITY
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